Help with proper hook up

You can put it between the amp and pre-amp - pre-out to C-9 in > C9 out to amp. I'd prefer the tape loop initially at least just to confirm to your self that it is both effective and desirable in your set up by switching it in and out. I found that when I took great care in setting up my listening position and speaker location properly I really didn't gain much with the C-9. And the C-9 instructions specify a good triangulated set up to work properly so you are half way there. If you have to put your speakers close to a wall however you might like its effect, or not. FWIW.

Thanks for your reply. I had to lift the tubes out of the sockets and put them back in. I hooked the c-9 between the amp and pre. I'm looking for my old carver c-1 manual for proper speaker set up, but I think I remember how to place them. Since I went to all tubes I got rid of 7 signal processors and have only missed the SH. I guess I'm addicted to it. Thanks again!